Prosecution Insights
Last updated: May 29, 2026
Application No. 18/702,400

DEHUMIDIFYING APPARATUS

Non-Final OA §103§112
Filed
Apr 18, 2024
Priority
Dec 09, 2021 — nonprovisional of PCTJP2021045277
Examiner
DUKE, EMMANUEL E
Art Unit
3763
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Mitsubishi Electric Corporation
OA Round
1 (Non-Final)
68%
Grant Probability
Favorable
1-2
OA Rounds
9m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
781 granted / 1140 resolved
-1.5% vs TC avg
Strong +28% interview lift
Without
With
+27.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
27 currently pending
Career history
1169
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
79.9%
+39.9% vs TC avg
§102
12.0%
-28.0% vs TC avg
§112
6.6%
-33.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1140 resolved cases

Office Action

§103 §112
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 7 and 10 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. In this instant, it is unclear what constitutes the “heat-transfer accelerator” as recited in both claims 7 and 10, respectively. For examination purposes, the Examiner in reading the claims in light of the specification, thereby interpret limitation recited to mean or express: the combine portions of the first and second extensions. Claim Rejections - 35 USC § 103 2. In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102 of this title, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 1-7 and 10 are rejected under 35 U.S.C. 103 as being unpatentable over FUJII et al (English Translated Japanese Pub No.: 2009078246 A), hereinafter referred to as FUJII et al ‘246, in view of NAGATA et al (English Translated WO Pub No.: 2020012549 A1), hereinafter referred to as NAGATA et al ‘549 and LIANG et al (English Translated Chinese Pub No.: 111366027 A), hereinafter referred to as LIANG et al ‘027. Regarding claim 1, FUJII et al ‘246 disclose a dehumidifying apparatus comprising: a housing (1) {see ¶¶ [0060-0064]}; an air inlet (3) provided in the housing {see ¶¶ [0060-0064]}; an air outlet (4) provided in the housing {see Figs. 1 and 9: ¶¶ [0003] and [0060-0064]}; a blower (106) provided in the housing { see Figs. 1 and 9: ¶¶ [0003] and [0060-0064]}; and an evaporator (104) provided on an air passage (105) that connects the air inlet and the air outlet, and configured to cool and dehumidify air that is sent into the housing by the blower {see Figs. 1 and 9: ¶¶ [0003] and [0060-0064]}. However, FUJII et al ‘246 fail to disclose the limitations of wherein the evaporator includes a plurality of flat tubes having flow passages through which refrigerant flows, a pair of headers connected to an upper end and a lower end of each of the flat tubes, a first extension portion connected to a windward side of one of the flat tubes, and having long sides extending in the up-down direction along of the flat tube, and a distance between any adjacent two of the flat tubes is less than or equal to 2.8 mm and greater than or equal to 2.0 mm. NAGATA et al ‘549 teach: the concept of the evaporator includes a pair of headers (21, 22) connected to an upper end and a lower end of each of the flat tubes (30), a first extension portion (31) connected to a windward side (30a) of one of the flat tubes, and having long sides extending in the up-down direction along of the flat tube {as shown in Figs. 1-4: Page 2/13 through Page 5/13}, and a distance (33) between any adjacent two of the flat tubes {see Page 3/13, ¶ 7}. Since all claimed elements were known in the art at the time of the invention, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify FUJII et al ‘246 evaporator by the evaporator of NAGATA et al ‘549 so as to include the use of evaporator that includes a pair of headers connected to an upper end and a lower end of each of the flat tubes, a first extension portion connected to a windward side of one of the flat tubes, and having long sides extending in the up-down direction along of the flat tube, and a distance between any adjacent two of the flat tubes, in order to facilitate improve drainage performance of the heat exchanger so that the heat performance of the heat exchanger can be improve {NAGATA et al ‘549 – Page 5/13, ¶ 6}. Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify the FUJII et al ‘246 in view of NAGATA et al ‘549 to obtain the invention as specified in claim 1. LIANG et al ‘027 teach: the concept of the distance (H) between any adjacent two of the flat tubes is less than or equal to 2.8 mm and greater than or equal to 2.0 mm {see Fig. 2: Page 7/10, ¶6}. Since all claimed elements were known in the art at the time of the invention, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify FUJII et al ‘246 as modified by NAGATA et al ‘549 evaporator by the evaporator of LIANG et al ‘027 so as to include the distance between any adjacent two of the flat tubes that is less than or equal to 2.8 mm and greater than or equal to 2.0 mm, in order to facilitate improve anti-frosting effect of the fins {LIANG et al ‘027 – Page 7/10, ¶6}. Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify the FUJII et al ‘246 as modified by NAGATA et al ‘549, in view of LIANG et al ‘027 to obtain the invention as specified in claim 1. Regarding claim 2, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 1, FUJII et al ‘246 as modified by NAGATA et al ‘549 teach the limitation of further comprising a second extension portion (32) connected to a leeward side of the flat tube, and extending in the up-down direction along the flat tube {as shown in Figs. 1-4: Page 2/13 through Page 5/13}. Regarding claim 3, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 2, FUJII et al ‘246 as modified by NAGATA et al ‘549 teach the limitation of wherein a width (L1) of the first extension portion and a width (L2) of the second extension portion are smaller than a width (Lp) of the flat tube {as shown in Figs. 1-4: Page 2/13 through Page 5/13}. Regarding claim 4, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 2, FUJII et al ‘246 as modified by NAGATA et al ‘549 teach the limitation of wherein in a depth direction (Lp) of the evaporator, the first extension portion (31) is longer than the second extension portion (32) {as shown in Figs. 1-4: Page 2/13 through Page 5/13}. Regarding claim 5, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 1, FUJII et al ‘246 as modified by NAGATA et al ‘549 teach the limitation of wherein a diameter of the header (22) connected to the lower end of the flat tube is smaller than a distance (L1) from a windward end of the first extension portion (L2) to a leeward end of the flat tube in a depth direction of the evaporator {as shown in Fig. 3: Page 2/13 through Page 5/13}. Regarding claim 6, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 2, FUJII et al ‘246 as modified by NAGATA et al ‘549 teach the limitation of wherein a diameter of the header (22) connected to the lower end of the flat tube is smaller than a distance from a windward end (31) of the first extension portion to a leeward end (32) of the second extension portion in a depth direction (Lp) of the evaporator {as shown in Figs. 1-2: Page 2/13 through Page 5/13}. Regarding claim 7, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 1, FUJII et al ‘246 further disclose comprising a condenser (102) provided downstream of the evaporator on the air passage (105) connecting the air inlet (3) and the air outlet (4) and configured to heat the air that is cooled and dehumidified by the evaporator, wherein the condenser includes a refrigerant pipe (A-D) through which the refrigerant flows {see Figs. 1 and 9: ¶¶ [0003] and [0060-0064]}; and FUJII et al ‘246 as modified by NAGATA et al ‘549 further teach the limitations of a heat-transfer accelerator (31/32) connected to the refrigerant pipe (10) and configured to accelerate heat exchange between a fluid (Air) passing through the condenser (13) and a fluid (R410A) flowing through the refrigerant pipe, and a distance between an upper end of the header connected to the upper end of the flat tube and a lower end of the header connected to the lower end of the flat tube is less than or equal to a length of the heat-transfer accelerator of the condenser in the up-down direction {see embodiment 1 Fig. Page 2/13 and embodiment 4 Fig. Page 9/13}. Regarding claim 10, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 1, FUJII et al ‘246 disclose the dehumidifying apparatus further comprising a condenser (102) provided downstream of the evaporator (104) on the air passage (105) connecting the air inlet (3) and the air outlet (4) and configured to heat the air that is cooled and dehumidified by the evaporator, wherein the condenser includes a refrigerant pipe (A) through which the refrigerant flows {see Figs. 1 and 9: ¶¶ [0003] and [0060-0064]}, and FUJII et al ‘246 as modified by NAGATA et al ‘549 further teach the limitations of a heat-transfer accelerator (31/32) connected to the refrigerant pipe (10) and configured to accelerate heat exchange between a fluid (Air) passing through the condenser (13) and a fluid (R410A) flowing through the refrigerant pipe, and a length of the evaporator in a depth direction is smaller than a length of the heat-transfer accelerator of the condenser in the depth direction {see embodiment 1 Fig. Page 2/13 and embodiment 4 Fig. Page 9/13}; and FUJII et al ‘246 as modified by NAGATA et al ‘549 in view of LIANG et al ‘027 further teach the dehumidifying apparatus of wherein a distance between any adjacent two of the flat tubes is smaller than or equal to 2.2 mm {see Page 7/10, ¶6}. Claim 8 is rejected under 35 U.S.C. 103 as being unpatentable over FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 as applied to claim 1 above, further in view of Taras et al (U.S. PG Pub No.: 2010/0012305 A1), hereinafter referred to as Taras et al ‘305. Regarding claim 8, the combination of FUJII et al ‘246, NAGATA et al ‘549 and LIANG et al ‘027 disclose and teach the dehumidifying apparatus of claim 1, FUJII et al ‘246 further disclose the limitations of comprising: a water storage tank (107) provided below the evaporator {as shown in Fig 9; ¶¶ [0003] and [0063]}. However, FUJII et al ‘246 fail to disclose the limitation of a water conduit configured to receive water that drops from the evaporator and guide the water to the water storage tank, wherein at least part of the header connected to the lower end of the flat tube is provided inside the water conduit. Taras et al. ‘305 teach: the concept of a water conduit (59) configured to receive water that drops from the evaporator (10) and guide the water to the water storage tank (45), wherein at least part (106) of the header (30) connected to the lower end of the flat tube (40) is provided inside the water conduit {as shown in Figs. 1-2 and 5: ¶ [0027]}. Since all claimed elements were known in the art at the time of the invention, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify FUJII et al ‘246 in view of Taras et al. ‘305 to include the use of a water conduit configured to receive water that drops from the evaporator and guide the water to the water storage tank, wherein at least part of the header connected to the lower end of the flat tube is provided inside the water conduit, in order to facilitate drainage of condensate by proving a downwardly extending surface along which condensate will flow to the fin nest low and eventually drain from the lower most fin into the condensate drain pan {Taras et al. ‘305 – ¶ [0027]}. Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention was made to modify the FUJII et al ‘246 in view of Taras et al. ‘305 to obtain the invention as specified in claim 8. Allowable Subject Matter 3. Claim 11 is objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion 4. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. U.S. Patent No. 2008/0029242 A1 to Ben-Salha et al. Any inquiry concerning this communication or earlier communications from the examiner should be directed to EMMANUEL DUKE, whose telephone number is (571)270-5290. The examiner can normally be reached on Monday - Friday; 6:00am - 2:30pm EST . If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Frantz Jules can be reached on 571-272-6681. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /EMMANUEL E DUKE/ Primary Examiner, Art Unit 3763 09/11/2025
Read full office action

Prosecution Timeline

Apr 18, 2024
Application Filed
Sep 16, 2025
Non-Final Rejection mailed — §103, §112
Apr 04, 2026
Response after Non-Final Action

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Prosecution Projections

1-2
Expected OA Rounds
68%
Grant Probability
96%
With Interview (+27.7%)
2y 11m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1140 resolved cases by this examiner. Grant probability derived from career allowance rate.

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